Year	current US$
1990	2095973176.098
1991	2173402903.37352
1992	2083822792.21034
1993	1588148806.64054
1994	1506665322.89485
1995	1467754841.08591
1996	1566602036.88433
1997	1438540776.49015
1998	1379150207.22557
1999	1289956354.63611
2000	1090530692.21689
2001	1053586088.49896
2002	1124458630.67024
2003	1350246961.85219
2004	1438927129.99951
2005	1390534619.04108
2006	1408554706.13164
2007	1539649003.46615
2008	1671140467.33945
2009	1565554956.64243
2010	1448167549.79546
2011	1520486068.76384
2012	1424265948.20386
2013	1454301843.82804
2014	1444463151.21005
2015	1221665935.70033
2016	1137908777.94009
2017	1141899812.97831
2018	1236203848.20423
2019	1192330814.83226
2020	1227444247.30295
2021	1286894193.64096